If the flow of air through the compressor is perpendicular to its axis, then it is a Axial flow compressor Reciprocating compressor Centrifugal compressor Turbo compressor TRUE ANSWER : ? YOUR ANSWER : ?
In the aircraft propellers Propulsive matter is ejected from within the propelled body All of these The propulsive matter is caused to flow around the propelled body Its functioning does not depend on presence of air TRUE ANSWER : ? YOUR ANSWER : ?
Clearance volume in actual reciprocating compressors is essential To accommodate Valves in the cylinder head To attain high volumetric efficiency To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head To provide cushioning effect TRUE ANSWER : ? YOUR ANSWER : ?
The efficiency of a jet engine is higher at Low speeds High speeds Low altitudes High altitudes TRUE ANSWER : ? YOUR ANSWER : ?
In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during None of these Isentropic compression Isothermal compression Polytropic compression TRUE ANSWER : ? YOUR ANSWER : ?
The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will Increase first at fast rate and then slow Increase first at slow rate and then fast Decrease continuously First increase, reach maximum and then decrease TRUE ANSWER : ? YOUR ANSWER : ?
In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into Vacuum Back to the compressor Discharge nozzle Atmosphere TRUE ANSWER : ? YOUR ANSWER : ?
Work ratio of a gas turbine may be improved by Decreasing the compression work Increasing the turbine work Both (A) and (C) above Increasing the compression work TRUE ANSWER : ? YOUR ANSWER : ?
Reciprocating air compressor is best suited for Large quantity of air at high pressure Small quantity of air at low pressure Small quantity of air at high pressure Large quantity of air at low pressure TRUE ANSWER : ? YOUR ANSWER : ?
Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on Change in load Mass flow rate Stagnation pressure at the outlet Pressure ratio TRUE ANSWER : ? YOUR ANSWER : ?